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fibril Line breaks: fi¦bril
Pronunciation: /ˈfʌɪbrɪl/

Definition of fibril in English:


A small or slender fibre: each muscle fibre is subdivided into smaller fibrils
More example sentences
  • As the number of fibrils decreases, it becomes increasingly easier to cut the next fibril because the fibrils carry larger and larger loads.
  • Many such pairs of filaments are bundled together into a structure called a fibril, and groups of fibrils make up a single muscle fiber (cell).
  • The direction of cell growth is determined by the orientation of the cellulose fibrils in the cell wall.


Example sentences
  • In particular, the mineral completely encases each fibril, enclosing the fibrillar volume.
  • The reticular, fibrillar and membranous differentiations of mesenchymatous origin become secondarily involved.
  • The single nucleus was oval, with pale chromatin and a large nucleolus rich in fibrillar and granular components.
Example sentences
  • They had ovoid nuclei, a small amount of lightly eosinophilic cytoplasm, and fibrillary cytoplasmic processes.
  • The tumor cells had elongated blunt-ended nuclei and acidophilic fibrillary cytoplasm.
  • Immunotactoid glomerulopathy is one of several renal disorders characterized by the extracellular deposition of nonamyloid fibrillary deposits.


Mid 17th century: from modern Latin fibrilla, diminutive of Latin fibra (see fibre).

Definition of fibril in:
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